Liquid crystal display device and method of fabricating the same

Abstract

A transflective liquid crystal display device includes a first substrate including transmissive and reflective pixels. Gate and data lines on the first substrate cross each other to define a pixel region, with a thin film transistor at each crossing. The transmissive and reflective pixels correspond to respective pixel regions. A first passivation layer covers the thin film transistor and has a transmissive hole in the transmissive pixel. A first reflector is disposed on the first passivation layer in the reflective pixel. A second passivation layer is disposed on the first reflector and in the transmissive hole. A pixel electrode on the second passivation layer is connected to the thin film transistor. A second substrate opposing the first substrate has a color filter layer on an inner surface thereof. The color filter layer contains R, G and B sub color filters, which each correspond to a pixel region.

1. A transflective liquid crystal display device, comprising:
 a first substrate including a transmissive pixel and a reflective pixel; 
 a plurality of gate lines and a plurality of data lines on the first substrate, the gate and data lines crossing each other to define a pixel region, the transmissive and reflective pixels correspond to respective pixel regions; 
 a thin film transistor at each crossing of the gate and data lines; 
 a first passivation layer covering the thin film transistor, the first passivation layer having a transmissive hole in the transmissive pixel; 
 a first reflector on the first passivation layer in the reflective pixel; 
 a second passivation layer in the transmissive pixel; 
 a pixel electrode on the second passivation layer; 
 a second substrate spaced apart from and facing the first substrate; 
 a color filter layer on an inner surface of the second substrate, the color filter layer containing red (R), green (G) and blue (B) sub color filters, each sub color filter corresponding to one of the pixel regions; 
 a liquid crystal layer between the first and second substrates; and 
 a second reflector between the first and second passivation layers in the transmissive pixel, the second reflector covering sides of the first passivation layer corresponding to the transmissive hole, 
 wherein three transmissive pixels constitute one transmissive dot, and three reflective pixels constitute one reflective dot, and wherein the one transmissive dot alternately arranged with the one reflective dot. 
 
   
   
     2. The device according to  claim 1 , wherein the second reflector overlaps the data lines. 
   
   
     3. A transflective liquid crystal display device, comprising:
 a first substrate including a transmissive pixel and a reflective pixel; 
 a plurality of gate lines and a plurality of data lines on the first substrate, the gate and data lines crossing each other to define a pixel region, the transmissive pixel and the reflective pixel corresponding to respective pixel regions; 
 a thin film transistor at each crossing of the gate and data lines; 
 a first passivation layer covering the thin film transistor, the first passivation layer having a transmissive hole in the transmissive pixel; 
 a reflective electrode on the first passivation layer in the reflective pixel, the reflective electrode connected to the thin film transistor; 
 a pixel electrode disposed in the transmissive pixel and connected to the thin film transistor; 
 a second substrate spaced apart from and facing the first substrate; 
 a color filter layer on an inner surface of the second substrate, the color filter layer containing red (R), green (G) and blue (B) sub color filters, each sub color filter corresponding to one of the pixel regions; 
 a liquid crystal layer between the first and second substrates; and 
 a second passivation layer disposed in the transmissive pixel on which the pixel electrode is disposed and a reflector between the first and second passivation layers in the transmissive pixel, the reflector covering sides of the first passivation layer corresponding to the transmissive hole, 
 wherein three transmissive pixels constitute one transmissive dot, and three reflective pixels constitute one reflective dot, and wherein the one transmissive dot alternately arranged with the one reflective dot. 
 
   
   
     4. The device according to  claim 3 , wherein the reflector overlaps the data lines. 
   
   
     5. A transflective liquid crystal display device, comprising: opposing first and second substrates;
 a liquid crystal layer between the first and second substrates; 
 transmissive and reflective pixels formed on the first substrate, the transmissive and reflective pixels separated by intersecting gate and data lines and alternating along at least one direction parallel with the gate or data lines; 
 a color filter layer containing red (R), green (G) and blue (B) sub color filters, each of which corresponds to one of the transmissive and reflective pixels; and 
 each of the transmissive and reflective pixels containing a thin film transistor covered by a first passivation layer and a first reflector disposed on the first passivation layer over the thin film transistor; 
 wherein the transmissive pixel contains a second passivation layer on which a pixel electrode is disposed, the first passivation layer contains a hole, and a second reflector that covers sides of the hole is disposed between the first and second passivation layers, and 
 in each of the transmissive and reflective pixels, the pixel electrode or first reflector is connected to the transistor. 
 
   
   
     6. The device according to  claim 5 , wherein, in each of the transmissive and reflective pixels, the second passivation layer is disposed on the first reflector and the pixel electrode, which is disposed over the first reflector, is connected to the transistor. 
   
   
     7. The device according to  claim 5 , wherein the first passivation layer has an uneven surface and the first reflector formed on the uneven surface of the first passivation layer is uneven. 
   
   
     8. The device according to  claim 7 , wherein the first passivation layer has an even surface between the first reflector and the second reflector and on which the first reflector is not formed and the second passivation layer covers at least a portion of the even surface. 
   
   
     9. The device according to  claim 8 , wherein the second passivation layer separates the second reflector from the first reflector. 
   
   
     10. The device according to  claim 9 , wherein no portion of the first passivation over which the first reflector is formed has an uneven surface. 
   
   
     11. The device according to  claim 5 , wherein the transmissive hole is formed in an area adjacent to the transistor in a direction parallel with the gate lines. 
   
   
     12. The device according to  claim 5 , wherein the first reflector is connected to the thin film transistor.